Diablo is one of the phew mercs I don't have and I'm not sure if I can buy more packs. But the problem I see Diablo in most pvp teams, so is it worth to craft it with coins and the farm coins for upgrapes?
Eventhough farming coins for legendaries like DIablo isn't the fastest in the world, trust me, coins soon become useless. Once a hero is maxed out there is no more use for them. Perhaps, in the distant future, who knows, but not now. Therefore you better spend coins asap.
EDIT: Once you have a Mercenary, you can get tasks for it, receive it as visitor, etc. You would be missing out on those things if you would not have the Mercenary. Therefore, the sooner the better.
Diablo is one of the phew mercs I don't have and I'm not sure if I can buy more packs. But the problem I see Diablo in most pvp teams, so is it worth to craft it with coins and the farm coins for upgrapes?
Yes, it's always worth to craft with coins. Unless you are planning to open a lot of packs with $.
Eventhough farming coins for legendaries like DIablo isn't the fastest in the world, trust me, coins soon become useless. Once a hero is maxed out there is no more use for them. Perhaps, in the distant future, who knows, but not now. Therefore you better spend coins asap.
EDIT: Once you have a Mercenary, you can get tasks for it, receive it as visitor, etc. You would be missing out on those things if you would not have the Mercenary. Therefore, the sooner the better.